Seiko 7B72 Operating instructions

Seiko
Brand
Seiko
Model
7B72
Category
Watches
Type
Operating instructions

This manual is also suitable for

7B62 / 7B72 BSJ7BCC-A2102
C-25
7B62 / 7B72
INSTRUCTIONS
Solar Radio Signal for 5 Areas Around the World (Japan, China, U.S.A., Germany, UK)
https://www.seikowatches.com/
..................................................
English ................................................
1
JA
1
EN
䬁Ổᶮ㔈
/
䷂橕ᶮ㔈
Please refer to the Instruction Manuals
of other languages by accessing
"Customer Service"→ "Instruction"
on our Website from PC or Smartphone.
Thank you very much for choosing a SEIKO watch.
For proper and safe use of your SEIKO watch,
please read carefully the instructions in this
booklet before using it.
Keep this manual handy for easy reference.
* Length adjustment service for metallic bands is available at the retailer from
whom the watch was purchased. If you cannot have your watch repaired by
the retailer from whom the watch was purchased because you received the
watch as a gift, or you moved to a distant place, please contact SEIKO
CUSTOMER SERVICE CENTER. The service may also be available on a
chargeable basis at other retailers, however, some retailers may not undertake
the service.
* If your watch has a protective film for preventing scratches, make sure to peel
it off before using the watch. If the watch is used with the film on it, dirt, sweat,
dust, or moisture may be attached to the film and may cause rust.
EN
1
CONTENTS
1 HOW TO USE
Handling cautions ............................................ 4
Characteristics ................................................ 8
Names of the parts and their functions .......... 10
How to use the button .................................... 12
Crown ............................................................ 13
2 BEFORE USE
Before Use .................................................... 14
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
Setting the time and date by receiving a radio
signal ............................................................. 16
Mechanism of radio signal reception ......... 16
Automatic reception and manual reception
...... 17
Reception environment ................................. 18
Radio signal reception range indication ..... 18
Radio signal reception range: Japan (JJY)
....... 19
Radio signal reception range: China (BPC)
...... 20
Radio signal reception range: U.S.A. (WWVB)
..... 21
Radio signal reception range: Germany
(DCF77), UK (MSF) ................................... 22
To improve radio signal reception .............. 23
Environments in which it is difficult to
receive a radio signal ................................. 24
How to check the reception status ................. 26
How to display the reception results .......... 26
4
TIME DIFFERENCE ADJUSTMENT FUNCTION
Time difference adjustment function (When
using overseas)
............................................ 28
Time difference adjustment function characteristics
.. 28
Setting the time difference (Setting the radio
signal transmitting station) ............................. 29
List of time zone differences in major regions
of the world .................................................... 31
Time zones and time differences ............... 32
Time difference adjustment Q&A ............... 33
EN
2
5 SOLAR CHARGING FUNCTION
Charging the battery ...................................... 34
How to charge the battery .......................... 34
Guide to charging times ............................. 35
About energy ................................................. 36
Energy depletion forewarning function (Two-
second interval movement and Five-second
interval movement) .................................... 36
Power save function .................................. 37
6
TO PRESERVE THE QUALITY OF YOUR WATCH
Daily care ...................................................... 38
Performance and type ................................... 39
Lumibrite ....................................................... 40
Power Source ................................................ 41
Water resistant performance ......................... 43
Magnetic resistant performance .................... 44
Band .............................................................. 46
How to use tri-fold type clasp for leather band
(Special clasps) ............................................. 48
After sales service ......................................... 54
7 TROUBLESHOOTING
How to conduct manual reception (Receive
a radio signal manually)
............................... 56
When a radio signal cannot be received ........ 58
How to manually set the time ..................... 59
How to manually set the date ..................... 61
Preliminary position ....................................... 64
Automatic hand position adjustment function
(Adjustment of preliminary positions of hour,
minute and seconds hands)
......................... 64
Preliminary position adjustment of the date
...... 64
How to set the preliminary position ................ 65
Set the preliminary position for the date,
and the hour and minute hands. ................ 65
Troubleshooting ............................................ 69
In case of an abnormal movement ................ 76
Reset the system ....................................... 76
8 SPECIFICATIONS
Specifications ................................................ 78
EN
3
Handling cautions
b WARNING
Please note that there is a risk of serious consequences such as severe injury if the following
safety regulations are not strictly observed.
Immediately stop wearing the watch in following cases:
○ If the watch body or band becomes edged by corrosion etc.
○ If the pins protrude from the band.
* Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE
CENTER.
Keep the watch and accessories out of the reach of babies and children.
Care should be taken to prevent a baby or a child accidentally swallowing the accessories.
If a baby or child swallows the battery or accessories, immediately consult a doctor, as it will be
harmful to the health of the baby or child.
Do not remove the secondary battery from the watch.
* About the secondary battery → Power Source → P.41
Replacement of the secondary battery requires professional knowledge and skill. Please ask the retailer
from whom the watch was purchased for replacement of the secondary battery.
Installation of an ordinary silver oxide battery can generate heat that can cause bursting and ignition.
EN
4
1
HOW TO USE
b CAUTION
Please note that there is a risk of minor injury or material damage if the following safety
regulations are not strictly observed.
Avoid the following places for wearing or keeping the watch:
○ Places where volatile agents (cosmetics such as polish remover, bug repellent, thinners etc.) are
vaporizing
○ Places where the temperature drops below
5°C or rises above 35°C for a long time
○ Places affected by strong magnetism or static
electricity
○ Places affected by strong vibrations
○ Places of high humidity
○ Dusty places
If you observe any allergic symptoms or skin irritation
Stop wearing the watch immediately and consult a specialist such as a dermatologist or an allergist.
Other cautions
○ For adjusting the length of the metallic band, specialized knowledge and expertise are necessary.
Therefore, in such a case, contact the retailer from whom the watch was purchased. If you attempt
to adjust the metallic band, injury may occur to your hand or fingers, or parts of the band may be
lost.
○ Do not disassemble or tamper with the watch.
○ Keep the watch out of the reach of babies and children. Extra care should be taken to avoid risks
of any injury or allergic rash or itching that may be caused when they touch the watch.
○ When disposing of used batteries, follow the instructions of your local authorities.
○ If your watch is of the fob or pendant type, the strap or chain attached to the watch may damage
your clothes, or injure the hand, neck, or other parts of your body.
EN
5
1
HOW TO USE
b WARNING
Do not use the watch in scuba diving or saturation diving.
The various tightened inspections under simulated harsh environment, which
are usually required for watches designed for scuba diving or saturation diving,
have not been conducted on the water resistant watch with the BAR (barometric
pressure) display. For diving, use watches specifically designed for diving.
b CAUTION
Do not pour running water directly from faucet.
The water pressure of tap water from a faucet is high enough to degrade the water
resistant performance of a water resistant watch for everyday life.
EN
6
1
HOW TO USE
b CAUTION
Do not turn or pull out the crown when the watch is wet.
Water may get inside of the watch.
* If the inner surface of the glass is clouded with condensation or water droplets appear
inside of the watch for a long time, the water resistant performance of the watch is
deteriorated. Immediately consult the retailer from whom the watch was purchased or
SEIKO CUSTOMER SERVICE CENTER.
Do not leave moisture, sweat and dirt on the watch for a long time.
Be aware of a risk that a water resistant watch may lessen its water resistant
performance because of deterioration of the adhesive on the glass or gasket, or the
development of rust on stainless steel.
Do not wear the watch while taking a bath or a sauna.
Steam, soap or some components of a hot spring may accelerate the deterioration
of water resistant performance of the watch.
EN
7
1
HOW TO USE
Characteristics
This is a solar-driven, radio signal-adjusted watch.
• This watch displays the precise time by receiving radio signals conveying time information.
• This watch can receive radio signals from Japan, China, U.S.A., Germany, and the UK.
■ Radio Signal Receiving
Function....................................
→ P.16
The watch maintains the precise time by automatically receiving
radio signals on official standard frequencies.
Manual reception of radio signals is also possible.
This can receive radio signals from Japan (2 stations), China,
U.S.A., Germany, and the UK. (Select the transmitting station in the
time difference adjustment function.)
■ Reception Level Indication
Function....................................
→ P.57
The movement of the seconds hand indicates the radio signal
reception level during radio signal reception attempts.
(Only manual reception)
■ Display Function of Radio
Signal Reception Results........
→ P.26
The movement of the seconds hand indicates radio signal reception
results (Yes/No).
■ Time Difference Adjustment
Function (Selecting
Transmitting Station)...............
→ P.28
Set the time difference in order to display the local time overseas.
Additionally, set the time difference to enable reception of the radio
signal in areas in which it is available.
EN
8
1
HOW TO USE
■ Solar Charging Function..........
→ P.34
A solar cell underneath the dial converts any form of light into
“electrical energy” to charge it. Once fully charged, the watch
continues to run for approximately 9 months.
■
Energy Depletion
Forewarning Function...........
→ P.36
The movement of the seconds hand indicates that the battery
should be charged.
■ Power Save Function...............
→ P.37
This watch is equipped with a function which can suppress energy
consumption when it is left without receiving an adequate light
source for a certain length of time.
■ Automatic Hand Position
Alignment Function..................
→ P.64
When the hand positions display an incorrect time as a result of
external influences such as magnetism, the watch automatically
corrects the hand misalignment.
EN
9
1
HOW TO USE
Names of the parts and their functions
1
Minute hand
2
Hour hand
3
Seconds hand
4
Date
5
Crown
• Normal position:
Reception results confirmation → P.26,
Manual reception → P.56
• First click position:
Time difference setting → P.29,
Manual date setting → P.61
• Second click position:
Manual time setting → P.59,
Reset the system → P.76
6
Button → P.12
* The operation method of the button varies with
the functions being used. Follow the instructions
of each section of this booklet.
1
4
5
6
2
3
EN
10
1
HOW TO USE
●
Reception level display
[Manual reception]
H
:
High reception level (50-second
position)
L
:
Low reception level (40-second
position)
N
:
Unable to receive radio signals
(20-second position)
* Reception level display → P.57
●
Reception result
display
[Check of reception result]
Y
:
Reception successful
(10-second position)
N
:
Reception failed (20-second
position)
* How to display the reception results
→ P.26
●
Standard radio signal display
Display (Country with radio signal
transmitting station)
Display position
JJY (Japan) 9-second position
BPC (China) 8-second position
WWVB (U.S.A.) 53-second position
DCF (Germany) 1-second position
MSF (UK) 0-second position
* Time difference adjustment function → P.28
* List of time zone differences in major regions of the world
→ P.31
EN
11
1
HOW TO USE
How to use the button
Some models may have a button which is recessed in the watch case to prevent accidental input.
Shape of the button differs depending on the design of the watch.
Upper half of the button is
covered.
Press the lower half of the button or
press the hollow in the middle
using an object with a long tapered
tip.
The button is covered except
the hollow in the middle.
Press the hollow in the middle
using an object with a long tapered
tip.
The button is recessed in the
watch case.
Press the hollow in the middle
using an object with a long tapered
tip.
EN
12
1
HOW TO USE
Crown
There are two types of crowns, a normal crown and a screw down crown.
Please check the type of the crown of your watch.
While
pressing the
crown in, turn it
in the direction
indicated by
the arrow.
The
crown
turns.
The crown
does not
turn.
Normal crown
Pull out the crown and operate it.
Screw down crown
Unlock the crown before
operating it.
After operating the crown,
lock it.
Unscrew
Rotate while
pressing
the crown in.
* By locking the crown by screw, a screw down crown can prevent malfunction and increase water resistance.
* Be careful not to screw the crown in by force as it may damage the slots of the crown.
EN
13
1
HOW TO USE
Before Use
1
Checking the Charging Status
When the movement of the seconds hand shows an energy depletion state, the battery requires
charging.
The seconds hand moves
at one-second intervals.
The seconds hand moves
at two-second intervals.
The seconds hand moves
at five-second intervals.
The seconds
hand is stopped.
The watch is
sufficiently charged.
The charged energy is depleted.
→ P.36
The power save function is activated. → P.
37
Check the movements of the seconds hand
after releasing the Power Save mode.
The energy stored in the watch runs low.
Charge the
battery
sufficiently.
How to charge
the battery
→ P.34
* If the seconds hand does not move at one-second intervals even after fully charging the battery, refer to
“Charging the solar battery” in Troubleshooting on P.72
EN
14
2
BEFORE USE
2
Checking the time and date
* When adjusting the time or date, refer to the following pages regarding the procedures.
When the time and
date are correct
Use the watch without
adjustment.
When the time
and date are
incorrect
Time
difference
setting
confirmation
→ P.29
When the radio
signal can be
received
Setting the time and date
by receiving a radio
signal → P.56
Radio signal reception range indication → P.
18
Environments in which it is difficult to receive a radio signal → P.
24
When a radio
signal cannot
be received
Manually set the time
→ P.59
Manually set the date
→ P.61
* When the watch does not display the correct time and date even after successfully receiving a radio signal, refer
to Troubleshooting.→ Misalignment of the time and hand positions P.72, and Misalignment of the date P.74
EN
15
2
BEFORE USE
Setting the time and date by receiving a radio signal
■ Mechanism of radio signal reception
The radio-controlled watch displays the precise Time and Date by automatically receiving and
synchronizing itself with the radio signal of an official standard frequency.
Transmitting
Station
Cesium
Atomic
Clock
Official standard
frequency
Radio-controlled watch
Receive radio signals through
the antenna inside the watch
Analyze time information
Display the current Time and
Date
Time signal transmitted by a standard frequency is based on a super accurate “Cesium Atomic Clock” that
may have a 1 second loss or gain per one hundred thousand years.
EN
16
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Automatic reception and manual reception
●
Automatic reception
This watch sets the time and date by automatically receiving a radio signal at a fixed time.
It automatically receives a radio signal before 2:00 AM, 3:00 AM and 4:00 AM.
* When the reception is successful, the watch finishes the automatic reception.
• Place the watch in a place where it can easily receive a radio signal (by the window, etc.).
• Do not move the watch during the radio signal reception.
“To improve radio signal reception” → P.23
●
Manual reception
This watch can receive a radio signal arbitrarily at any time other than the automatic reception mode.
“How to conduct manual reception” → P.56
* Radio signal reception results depend on the receiving environment. “Environments in which it is difficult to receive
a radio signal” → P.24
* The watch cannot receive a radio signal outside the radio signal reception range. “Radio signal reception range
indication” → P.18
* When the time difference is set for a region other than radio signal reception range, a radio signal cannot be
received. Check the setting of the time difference. “Setting the time difference (Setting the radio signal transmitting
station)” → P.29
*
When the watch does not display the correct time and date even after successfully receiving a radio signal, refer to
Troubleshooting. “Misalignment of the time and hand positions” → P.72, “Misalignment of the date” → P.74
EN
17
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
Reception environment
■ Radio signal reception range indication
This watch receives standard radio signals from Japan (2 stations), China, U.S.A., Germany and UK.
Select the transmitting station in the time difference adjustment function to switch the standard radio signal
to receive.
“Setting the time difference (Setting the radio signal transmitting station)” → P.29
Germany (DCF77), UK (MSF)
P.22
China (BPC)
P.20
Japan (JJY)
P.19
U.S.A.
(WWVB)
P.21
EN
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3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Radio signal reception range: Japan (JJY)
The reception range from the transmitting station is approximately 1,000 km (1,000 km radius of the
transmitting station).
Hagane-yama
transmitting
station (60 kHz)
Ohtakadoya-
yama
transmitting
station (40 kHz)
1,000 km
1,000 km
JJY is operated by the National Institute of
Information and Communications Technology
(NICT).
JJY is transmitted from two stations in Japan. Each
station transmits JJY in a different frequency.
Fukushima : Ohtakadoya-yama transmitting
station
Frequency: 40 KHz
Kyushu : Hagane-yama transmitting station
Frequency: 60 KHz
* NICT: National Institute of Information and
Communications Technology
* Even within the reception range, weather conditions,
terrain, buildings, and orientation may mean that
reception is not possible.
“Environments in which it is difficult to receive a radio
signal” → P.24
EN
19
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Radio signal reception range: China (BPC)
The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of the
transmitting station).
Shangqiu
National Time
Service Center
(68.5 kHz)
1,500 km
BPC is operated by NTSC.
Shangqiu National Time Service Center
Frequency: 68.5 kHz
* NTSC: National Time Service Center
* The watch may be able to receive radio signals outside
a reception range if the receiving conditions are
favorable.
* Even within the reception range, weather conditions,
terrain, buildings, and orientation may mean that
reception is not possible.
“Environments in which it is difficult to receive a radio
signal” → P.24
EN
20
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Radio signal reception range: U.S.A. (WWVB)
The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of the
transmitting station).
There are four time zones within the reception range.
Fort Collins
transmitting station
Frequency (60 KHz)
1,500 km
WWVB is operated by NIST.
Fort Collins transmitting station
Frequency: 60 kHz
* NIST: National Institute of Standards and Technology
* The watch may be able to receive radio signals outside
a reception range if the receiving conditions are
favorable.
* Even within the reception range, weather conditions,
terrain, buildings, and orientation may mean that
reception is not possible.
“Environments in which it is difficult to receive a radio
signal” → P.24
* Use of automatic reception is recommended, as this
time frame is optimal for automatic reception.
EN
21
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Radio signal reception range: Germany (DCF77), UK (MSF)
Each reception range from the transmitting station of DCF77 and MSF is approximately 1,000 km and 500 km
(1,000 km and 500 km radius of the each transmitting station). There are four time zones within the reception
range.
Mainflingen
transmitting station
(77.5 kHz)
Anthorn transmitting station
(60.0 kHz)
1,000 km
Approx. 500 km
DCF77 is operated by PTB.
Southeastern Frankfurt
Mainflingen transmitting station (77.5 kHz)
* PTB: Physikalisch-Technische Bundesanstalt
MSF is operated by NPL.
Northern England
Anthorn transmitting station
Frequency: 60.0 kHz
* NPL: National Physical Laboratory
* Even within the reception range, weather conditions,
terrain, buildings, and orientation may mean that
reception is not possible.
“Environments in which it is difficult to receive a radio
signal” → P.24
* Use of automatic reception is recommended, as this
time frame is optimal for automatic reception.
EN
22
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ To improve radio signal reception
●
Place the watch in a place where it can easily receive a radio signal
such as near a window.
The antenna is embedded at the 9 o’clock position of the watch.
Turning the antenna toward the outside of a window or the
direction facing transmitting stations helps improve radio signal
reception.
* Locations of transmitting stations
“Radio signal reception range indication” → P.18
●
Do not move the watch while it is
receiving radio signals.
To enhance the reception of radio signals, do not move the
watch or do not change the orientation of the watch while it is
receiving radio signals.
* If the button or crown is operated while the watch is receiving a
radio signal, the reception will be cancelled.
●
The place where the watch is put before going to bed
Place the watch next to a window facing in the direction of a transmitting station before bedtime because
automatic reception is performed late at night.
The standard radio signal is influenced by the distance from the transmitting station, as well as by terrain
(including buildings) and weather conditions.
Also, please search for a place to easily receive radio signals when attempting reception.
Antenna
EN
23
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
■ Environments in which it is difficult to receive a radio signal
Avoid putting the watch in such places when it receives radio signals.
• Close to home electrical appliances
such as TV’s, refrigerators or air
conditioners
• Close to OA equipment such as
mobile phones, personal computers
or fax machines
• Close to steel desks or other
furniture made of metal
• In places generating radio
interference, such as construction
sites or places with heavy traffic
• Close to overhead power lines, TV
stations, train cables
• Inside a building, between tall
buildings, underground
• Inside a vehicle, train, or airplane
EN
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3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
b
CAUTION
• The watch may display the wrong time if it fails to receive radio signals properly
because of interference.
The watch may also fail to receive radio signals properly depending on the location or
radio wave receiving conditions.
In this case, move the watch to another place where it can receive radio signals.
• When the watch is out of reception range, its accurate quartz movement (loss / gain:
±15 seconds per month on average) will continue to keep the time.
• The time signal transmission may be stopped during maintenance of the facilities of
the (each) transmitting station or because of a lightning strike.
In such a case, see the (each) station’s website for further information or contact
SEIKO CUSTOMER SERVICE CENTER.
• Websites of transmission stations (As of August 2020)
Japan : National Institute of Information and Communications Technology (Japan
Standard Time Project) http://jjy.nict.go.jp/
China : NTSC http://www.ntsc.cas.cn/
U.S.A. : NIST https://www.nist.gov/pml/time-and-frequency-division/radio-
stations/wwvb
Germany : PTB https://www.ptb.de/cms/en.html
UK : NPL https://www.npl.co.uk/
EN
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3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
How to check the reception status
■ How to display the reception results
The seconds hand indicates the latest reception results (Yes/No) of a radio signal for 5 seconds.
1
Press the button once and then
release it.
The seconds hand indicates the reception
results.
Press the
button once
and then
release it
2
Check if the reception was
successful (within 5 seconds).
If a reception was
successful: The seconds
hand points to Y
(Yes: the 10-second
position)
If a reception has failed: The
seconds hand points to N
(No: the 20-second
position)
* If the button is pressed after 5 seconds have
elapsed or while the seconds hand is moving to
display the reception results, the reception
results display function is cancelled and the
watch returns to the TIME display mode.
EN
26
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
If a reception was successful: The seconds hand points to Y
• A radio signal has been received successfully. Use the watch without any adjustments.
* When the watch does not display the correct time and date even after successfully receiving a radio signal, refer
to Troubleshooting.→ Misalignment of the time and hand positions P.72, and Misalignment of the date P.74
If reception has failed: The seconds hand points to N
•
Place the watch in a place where it can easily receive a radio signal, or change its direction.
Even within the radio signal reception range, this watch may fail to receive a radio signal depending on
the condition (due to the influence of weather, terrain, buildings, or direction). “Environments in which it
is difficult to receive a radio signal” → P.24
This watch is unable to receive radio signals outside the reception range. “Radio signal reception range
indication” → P.18
•
Make sure that the time difference is correctly selected before attempting radio signal reception.
If the time difference is set to an area outside reception range, then reception of the radio signal will not
be possible. Check the time difference setting.
“Setting the time difference (Setting the radio signal transmitting station)” → P.29
“List of time zone differences in major regions of the world” → P.31
•
Attempt to receive a radio signal in a different time period. (In the case of manual reception)
Receiving environments differ according to time periods even at the same place. Due to radio signal
characteristics, the watch is able to easily receive radio signals during nighttime hours.
• If you use the watch in a place or region outside the radio signal reception range or when the watch
cannot successfully receive radio signals, manually set the time and date.
“How to manually set the time” → P.59
“How to manually set the date” → P.61
EN
27
3
HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)
Time difference adjustment function (When using overseas)
■ Time difference adjustment function characteristics
•
Set the time difference in the time difference adjustment mode
to display an overseas local time.
The watch can display an overseas local time in one-hour units.
The time difference is set based on UTC (Coordinated
Universal Time).
The range of time differences around the world based on UTC
is [from -11 hours to +13 hours].
•
In the time difference adjustment mode, the time difference
based on UTC (Coordinated Universal Time) is displayed by
the position of the seconds hand.
To set the time difference, turn the crown to move the seconds
hand to the correct position.
•
A radio signal transmitting station is selected by setting the
time difference.
When setting the time difference for a region other than the
radio signal reception ranges, the radio signal reception
function will not work.
Examples
:
When using the watch in Japan, set the seconds
hand to the [9-second position: Tokyo] to receive a
radio signal from Japan.
When using the watch in China, set the seconds
hand to the [8-second position: Beijing].
“Setting the time difference (Setting the radio signal
transmitting station)” → P.29
“List of time zone differences in major regions of the world” → P.31
<How to read the seconds hand position and time
difference (Radio signal transmitting station)>
* The numbers in parenthesis are time differences based on UTC.
1
8
9
53
-11
13
0-second position: UTC
London (±0):
MSF
Denver (-7):
WWVB
Berlin (+1):
DCF77
Beijing (+8):
BPC
Tokyo (+9):
JJY
EN
28
4
TIME DIFFERENCE ADJUSTMENT FUNCTION
Setting the time difference (Setting the radio signal
transmitting station)
01 2
Pull the
crown to the
first click
Turn the crown clockwise to
advance the time difference.
Turn the crown counterclockwise
to set back the time difference.
1
Pull the crown to the first click.
The watch switches to the time difference adjustment
mode, and the seconds hand moves to the currently-set
time difference.
2
Turn the crown to set the seconds hand to
the time difference of the target area.
Turn the crown to move the seconds hand, and the hour
and minute hands will move accordingly.
One-second movement of the hand indicates the time
difference has changed by one hour.
The position of the seconds hand shows the difference.
Please set it by referring to P.31.
The hour and minute hands show the time in the location
of the set time difference.
*
The seconds hand can also be moved while the hour and
minute hands are moving.
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TIME DIFFERENCE ADJUSTMENT FUNCTION
The radio signal transmitting station can be changed by setting the time difference. When
setting a time difference for regions other than the radio signal reception ranges, the
radio signal reception function will not work.
* When setting the Daylight Saving Time (DST), add one hour to the time difference of the target area.
In Japan In China In the other countries
Set to the 9-second
position
Set to the 8-second
position
“List of time zone
differences in major
regions of the world”
→ P.31
* When the seconds hand is at 13 seconds (UTC +13 hours), turn the crown clockwise to move to the 49-second position
(UTC -11 hours).
* When the seconds hand is at 49 seconds (UTC -11 hours), turn the crown counterclockwise to move to the 13-second
position (UTC +13 hours).
3
Push the crown back in.
The seconds hand returns to normal one-second interval movement.
* When the date is changed, it is also moved.
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TIME DIFFERENCE ADJUSTMENT FUNCTION
List of time zone differences in major regions of the world
Refer to the table below to set the time difference area in the Time Difference Adjustment mode.
* When setting a time difference for a region where no receivable official standard frequency is mentioned in the
table below, the radio signal reception function will not work.
(As of August 2020)
Time difference
setting
seconds hand
position
Time
difference
from UTC
Time zone
representative
city
Reception
frequency
0 seconds ±0 hours London MSF/DCF77
1 second +1 hour Paris / Berlin MSF/DCF77
2 seconds +2 hours Cairo MSF/DCF77
3 seconds +3 hours Jeddah DCF77
4 seconds +4 hours Dubai DCF77 △
5 seconds +5 hours Karachi -
6 seconds +6 hours Dhaka -
7 seconds +7 hours Bangkok -
8 seconds +8 hours Beijing BPC
9 seconds +9 hours Tokyo JJY
10 seconds +10 hours Sydney JJY △
11 seconds +11 hours Noumea -
12 seconds +12 hours Wellington -
13 seconds +13 hours
Nuku’alofa
(Tongatapu)
-
Time difference
setting
seconds hand
position
Time
difference
from UTC
Time zone
representative
city
Reception
frequency
49 seconds -11 hours Midway Island -
50 seconds -10 hours Honolulu -
51 seconds -9 hours Anchorage -
52 seconds -8 hours Los Angeles WWVB
53 seconds -7 hours Denver WWVB
54 seconds -6 hours Chicago WWVB
55 seconds -5 hours New York WWVB
56 seconds -4 hours Santo Domingo WWVB △
57 seconds -3 hours Rio de Janeiro -
58 seconds -2 hours
Fernando de
Noronha
-
59 seconds -1 hour Azores Islands -
To use Daylight Saving Time (DST) where this is observed, select the time zones with a △ mark in the Reception
frequency columns.
EN
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4
TIME DIFFERENCE ADJUSTMENT FUNCTION
■ Time zones and time differences
There are time differences around the world based on “Coordinated Universal Time (UTC).”
There are 24 regions (Time Zones) around the world with a time difference of one hour. This
system has been adopted internationally by setting the total time difference around the world as
24 hours.
Further, Daylight Saving Time (DST) is individually adopted in countries and regions.
[What is UTC (Coordinated Universal Time)?]
UTC is the universal standard time coordinated through international agreement. It is used as the official
time around the world. UTC is a time coordinated by adding leap seconds to the “International Atomic
Time (TAI)” determined from atomic clocks in the world, in order to correct the deviation from the
astronomically defined universal time (UT).
[What is summer time (DST)?]
Summer time is Daylight Saving Time (DST).
Advance the watch one hour to prolong daytime during longer daylight hours in summer.
Daylight saving time has been adopted in about 80 countries, mainly in Europe and North America.
The adoption and duration of Daylight Saving Time (DST) vary depending on the country.
* Time differences between regions and daylight saving time may change due to circumstances of a country or
region.
* In some regions, time zones that differ from UTC by half- or quarter-hour time differences are established. (For
example, some parts of India)
* Each indication may differ depending on the model (design) of the watch.
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TIME DIFFERENCE ADJUSTMENT FUNCTION
■ Time difference adjustment Q&A
Q : When returning to Japan from overseas, is the time automatically set to Japan time?
A : Just moving does not adjust your watch to Japanese local time.
When wearing a watch in Japan, set to Japan time by use of the time difference adjustment function.
Q : The hands stop during operation of time difference setting, therefore, does time lag occur?
A : The internal circuit stores the time, therefore, no time lag occurs.
Q : When a time difference for regions out of the radio signal reception range is set, the watch will not
receive a radio signal. How is the accuracy of the watch at that time?
A : The watch has an accuracy of a normal quartz watch in that case. (Monthly rate: ±15 seconds)
Q : How is adjustment made to a local time with a time difference of 15 minutes or 30 minutes?
A : The time can be adjusted on a 1 hour basis by use of the time difference adjustment function. When
adjusting to a local time with a time difference of 15 minutes or 30 minutes, refer to “How to manually
set the time” → P.59
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TIME DIFFERENCE ADJUSTMENT FUNCTION
Charging the battery
■ How to charge the battery
Expose the dial to light to charge the watch.
To ensure optimal performance of the watch, make
sure that the watch is kept sufficiently charged at all
times.
Under the following situations, the energy of the
watch is likely to be depleted, resulting in stoppage
of the watch:
• The watch is concealed under a sleeve.
•
The watch is used or stored under conditions where
it cannot be exposed to light for a long time.
* Be careful to make sure that the watch does not get hot when it is charging. (The operating temperature range is
-10°C to +60°C.)
* When you first start using the watch or starting it after it stopped due to a lack of charge, charge the watch sufficiently
using the table on P.35 as a guide.
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5
SOLAR CHARGING FUNCTION
■ Guide to charging times
Charge the watch using the times below as a guide.
Illuminance
lx (LUX)
Light source Condition (Example)
From the state where the watch is
stopped (Not charged)
In the state where
the hand moves (The
watch is charged)
Time required for
fully charging the
watch
Time required for
charging the watch
to start moving at
one-second
intervals
Time required for
charging the watch
to last for 1 day
700
Fluorescent
light
General offices - - 4 hours
3,000
Fluorescent
light
30 W 20 cm 230 hours 6 hours 1 hour
10,000
Fluorescent
light
30 W 5 cm
60 hours 1.5 hours 15 minutes
Sunlight Cloudy day
100,000 Sunlight
Sunny day (Under the
direct sunlight on a
summer day)
30 hours 30 minutes 3 minutes
The figures of “Time required for charging the watch to start moving at one-second intervals” are estimations of
time required to charge the stopped watch by exposing it to light until it moves at steady one-second intervals.
Even if the watch is partially charged for a shorter period, the watch will resume one-second interval movement.
However, it may shortly return to two-second interval movement. Use the charging time in this column as a rough
guide for sufficient charging time.
* The seconds hand movement indicates the remaining amount of energy. “Checking the Charging Status” → P.14
* The required charging time slightly varies depending on the model of the watch.
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35
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SOLAR CHARGING FUNCTION
About energy
■ Energy depletion forewarning function (Two-second
interval movement and Five-second interval movement)
The energy depletion forewarning function is activated when the energy stored in the watch runs low.
In such a case, the seconds hand moves at two-second intervals.
If the watch continues to be in the state of two-second interval movement, the watch switches to five-second
interval movement, followed by a completely stopped state.
If the energy depletion forewarning function is activated, charge the watch sufficiently.
“How to charge the battery” → P.34
“Guide to charging times” → P.35
* Neither the button nor the crown can be operated while the seconds hand moves at two-second or five-second
intervals. (This is not a malfunction.)
* While the seconds hand moves at five-second intervals, the hour and minute hands, as well as the date, stop
operating.
* While the seconds hand moves at five-second intervals, the automatic reception function and manual reception
function will not work. After the watch is charged sufficiently and the seconds hand returns to normal one-second
interval movement, conduct the manual reception of radio signals to set the watch to the correct time. (“Automatic
reception and manual reception” → P.17)
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SOLAR CHARGING FUNCTION
■ Power save function
This watch is equipped with a power save function which can suppress energy consumption when it is left without receiving
an adequate light source for a certain length of time.
* There are two types of power save mode.
Power Save 1 Power Save 2
Condition
The watch is exposed to a state without receiving an
adequate light source for 72 hours or longer.
The watch is in an insufficient charging state for a long
time.
Situation
The seconds hand
stops pointing at the
15-second position,
and the hour and
minute hands, and
date also stop.
The watch conducts
automatic radio signal
receiving.
The seconds hand
stops pointing at the
45-second position,
and the hour and
minute hands, and
date also stop.
The watch does not
conduct automatic
radio signal receiving.
* The date shows “1”.
How to
handle the
situation
When the watch is exposed to an adequate light source
for 5 seconds or longer, or the button is pressed, it
displays the current time again after the seconds hand
is rapidly advanced.
After sufficiently charging the battery, set the watch for
the current time, if necessary.
Power Save 2
* While the watch is being charged, the seconds hand moves at “Five-second Intervals.” During the “Five-second Interval Movement,”
neither the button nor the crown can be operated.
* If the “Power Save 2” mode is prolonged, the stored power amount drops and the internal current time information stored will be lost.
When the watch returns to its normal movement of one-second interval after sufficiently charging the battery, set the current time by
receiving a radio signal. (“Automatic reception and manual reception” → P.17)
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SOLAR CHARGING FUNCTION
Daily care
●
The watch requires good daily care
• Do not wash the watch when its crown is in the extended position.
• Wipe away moisture, sweat or dirt with a soft cloth.
• After soaking the watch in seawater, be sure to wash the watch in clean pure water and wipe it dry
carefully.
Do not pour running water directly from a faucet onto the watch. Put some water into a bowl first, and
then soak the watch in the water to wash it.
* If your watch is rated as “Non-water resistant” or “water resistant for daily use,” please do not wash the watch.
“Performance and type” → P.39
“Water resistant performance” → P.43
●
Turn the crown from time to time
• In order to prevent corrosion of the crown, turn the crown from time to time.
• The same practice should be applied to a screw down crown.
“Crown” → P.13
●
Press the button once in a while
• Press the button once in a while to prevent corrosion of the button.
* If the display is changed by pressing any button, wait and leave it as is.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Performance and type
The case back shows the caliber and performance of your watch
7B72-0AA0
7
B
7
2
-
0
A
A
0
0
0
0
0
0
0
M
A
D
E
I
N
J
A
P
A
N
W
A
T
E
R
R
E
S
I
S
T
A
N
T
1
0
B
A
R
S
T
A
I
N
L
E
S
S
S
T
E
E
L
Water resistant
performance
Case Number
Magnetic resistant
performance
•
Water resistant performance
Please refer to P.43.
•
Case Number
The number to identify the type of your watch.
•
Magnetic resistant performance
Please refer to P.44 and P.45.
* The above illustration is provided as an example, therefore it may not be exactly the same as your watch.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Lumibrite
If your watch has Lumibrite
Lumibrite is a luminous paint that absorbs the light energy of sunlight and lighting apparatuses in a short
time and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux for
approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, that, as Lumibrite
emits the light it stores, the luminance level of the light decreases gradually over time. The duration of the
emitted light may also differ slightly depending on such factors as the brightness of the place where the
watch is exposed to light and the distance from the light source to the watch.
* In general, when coming from a place that is bright to a place that is dark, it takes human eyes some time to adapt
to the darkness making it difficult to see objects initially. (Dark adaptation)
* Lumibrite is luminous paint that stores and emits light, which is harmless to human beings and the environment,
containing no toxic materials such as radioactive substances.
<Brightness levels>
Condition Illumination
Sunlight
Fine weather 100,000 lux
Cloudy weather 10,000 lux
Indoor (Window-side during
daytime)
Fine weather More than 3,000 lux
Cloudy weather 1,000 to 3,000 lux
Rainy weather Less than 1,000 lux
Lighting apparatus (40-watt daylight
fluorescent light)
Distance to the watch: 1 m 1,000 lux
Distance to the watch: 3 m 500 lux (Average room luminance)
Distance to the watch: 4 m 250 lux
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Power Source
The battery used in this watch is a special secondary battery, which is different from ordinary
batteries.
Unlike an ordinary silver oxide battery, the secondary battery does not require periodic
replacement.
The capacity or charging efficiency may gradually lower due to long-term use or operating
environment.
In addition, long-term use may shorten the charge duration due to wear, contamination, lubricant
deterioration of mechanical parts, etc. Request repair when the performance lowers.
b
WARNING
■ Notes on replacing the secondary battery
• Do not remove the secondary battery from the watch.
Replacement of the secondary battery requires professional knowledge and skill.
Please ask the retailer from whom the watch was purchased for replacement of the
secondary battery.
• Installation of an ordinary silver oxide battery can generate heat that can cause
bursting and ignition.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
* Overcharge prevention function
When the secondary battery is fully charged, the overcharge prevention function is automatically
activated to avoid further charging.
There is no need to worry about damage caused by overcharging no matter how much the
secondary battery is charged in excess of the “time required for fully charging the watch.”
* For the required time to fully charge the battery, see “Guide to charging times” → P.35.
b
WARNING
■ Notes on charging the watch
• When charging the watch, do not place the watch in close proximity to an intense light
source such as lighting equipment for photography, spotlights or incandescent lights,
as the watch may be excessively heated resulting in damage to its internal parts.
• When charging the watch by exposure to direct sunlight, avoid places that easily reach
high temperatures, such as a car dashboard.
• Always keep the watch temperature under 60°C.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Water resistant performance
Refer the table below for the description of water resistant performance of your watch before using.
(Please look at P.39.)
Indication on the
case back
Water resistant
performance
Conditions of Use
No indication Non-water resistance Avoid drops of water or sweat
WATER
RESISTANT
Water resistance for
everyday life
The watch withstands
accidental contact with
water in everyday life.
b
WARNING
Please do not use it for
swimming.
WATER
RESISTANT
5 BAR
Water resistance for
everyday life at 5-BAR
water resistant
The watch is suitable for sports such as swimming.
WATER
RESISTANT
10（
20）BAR
Water resistance for
everyday life at 10 (20)-BAR
water resistant
The watch is suitable for diving not using an air cylinder.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Magnetic resistant performance
Affected by nearby magnetism,
a watch may temporarily gain or lose time or stop operating.
* When the hand positions deviate to display incorrect time as a result of influence of magnetism, this watch
automatically corrects the hand alignment itself. (P.64)
b DANGER
Indication on the case back Condition of use
No indication Keep the watch more than 10 cm away from magnetic products.
Keep the watch more than 5 cm away from magnetic products.
(JIS level-1 standard)
Keep the watch more than 1 cm away from magnetic products.
(JIS level-2 standard)
If the watch becomes magnetized and its accuracy deteriorates to an extent exceeding the specified rate
under normal use, the watch needs to be demagnetized. In this case, you will be charged for
demagnetization and accuracy readjustment even if it happens within the guarantee period.
The reason why a watch is affected by magnetism
The built-in motor is provided with a magnet, which may be influenced by a strong external magnetic field.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Examples of common magnetic products that may affect watches
Smartphone, cellular phone, tablet terminal
(Speaker, magnet of cover)
AC adapter Bag
(With magnet
buckle)
AC-powered
shaver
Magnetic
cooking device
Portable radio
(Speaker)
Magnetic
necklace
Magnetic health
pillow
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TO PRESERVE THE QUALITY OF YOUR
WATCH
Band
The band touches the skin directly and becomes dirty with sweat or dust. Therefore, lack of care
may accelerate deterioration of the band or cause skin irritation or stain on the sleeve edge.
The watch requires a lot of attention for long usage.
●
Metallic band
• Moisture, sweat or soil will cause rust even on a stainless steel band if they are left for a long time.
•
Lack of care may result in a rash or cause a yellowish or gold stain on the lower sleeve edge of shirts.
• Wipe off moisture, sweat or soil with a soft cloth as soon as possible.
• To clean the soil around the joint gaps of the band, wipe it out in water and then brush it off with a soft
toothbrush.
(Protect the watch body from water splashes by wrapping it up in plastic wrap etc.)
Clean it off with a soft cloth.
• Because some titan bands use pins made of stainless steel, which has outstanding strength, rust may
form in the stainless steel parts.
• If rust advances, pins may poke out or drop out, and the watch case may fall off the band, or the clasp
may not open.
• If a pin is poking out, personal injury may result. In such a case, refrain from using the watch and request
repair.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
●
Leather band
• A leather band is susceptible to discoloration and deterioration from moisture, sweat and direct sunlight.
• Wipe off moisture and sweat as soon as possible by gently blotting them up with a dry cloth.
• Do not expose the watch to direct sunlight for a long time.
• Please take care when wearing a watch with light-colored band, as dirt is likely to show up.
•
Refrain from wearing a leather band watch other than Aqua Free bands while bathing, swimming, and
when working with water even if the watch itself is water resistant enforced for daily use (10-BAR/20-BAR
water resistant).
●
Polyurethane band
• A polyurethane band is susceptible to discoloration from light, and may be deteriorated by solvent or
atmospheric humidity.
•
Especially a translucent, white, or pale colored band easily adsorbs other colors, resulting in color smears
or discoloration.
• Wash out dirt in water and clean it off with a dry cloth.
(Protect the watch body from water splashes by wrapping it up in plastic wrap etc.)
• When the band becomes less flexible, have the band replaced with a new one. If you continue to use
the band as it is, the band may develop cracks or become brittle over time.
Notes on skin
irritation and
allergy
Skin irritation caused by a band may result from various factors such as allergy to
metals or leathers, or skin reactions against friction on dust or the band itself.
Notes on the
length of the band
Adjust the band to allow a little clearance with your wrist to ensure proper
airflow.
When wearing the watch, leave enough room to insert a finger between
the band and your wrist.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
How to use tri-fold type clasp for leather band (Special clasps)
There are 3 types of special clasps as described below;
If the clasp of the watch you purchased is one of them, please refer to the indications.
A A Type → P.49
B B Type → P.50
C C Type → P.51
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TO PRESERVE THE QUALITY OF YOUR
WATCH
A A Type
1
Lift up the clasp to release the buckle.
Fixed loop
Movable loop
Buckle
Flap
2
Open the flap.
3
Remove the pin from the adjustment hole. Slide the
band left and right, and reinsert the pin into the
adjustment hole at an appropriate length.
Pin
Adjustment hole
4
Fasten the flap.
* Do not push the flap in too hard.
* When fastening the clasp, insert the tip of the band
into the movable loop and fixed loop, and then,
securely tighten the clasp.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
B B Type
1
While pressing the push buttons on the both
sides of the flap, lift to open the clasp.
Push button
2
Remove the pin from the adjustment hole.
Slide the band left and right, and insert the pin
into the adjustment hole at an appropriate
length. Push the buckle and fasten the clasp.
Buckle
Pin
Adjustment hole
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TO PRESERVE THE QUALITY OF YOUR
WATCH
C C Type
●
How to wear or take off the watch
1
While pressing the push buttons on the both
sides of the flap, pull the band out of the
movable loop and fixed loop. Then open the
clasp.
Fixed loop
Movable loop
Buckle
Flap
Push button
2
Place the tip of the band into the movable loop
and fixed loop, and fasten the clasp by
pressing the frame of the buckle.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
●
How to adjust the length of the band
1
While pressing the push buttons on the both
sides of the flap, pull the band out of the
movable loop and fixed loop. Then open the
clasp.
Fixed loop
Movable loop
Buckle
Flap
Push button
2
Press the push buttons again to unfasten the
flap.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
3
Pull the pin out of an adjustment hole of the
band. Slide the band to adjust its length and
find an appropriate hole. Place the pin into the
hole.
Pin
Adjustment hole
Pin
Adjustment hole
4
Fasten the flap.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
After sales service
●
Notes on guarantee and repair
• Contact the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE CENTER
for repair or overhaul.
• Within the guarantee period, present the certificate of guarantee to receive repair services.
• Guarantee coverage is provided in the certificate of guarantee.
Read carefully and retain it.
• For repair services after the guarantee period has expired, if the functions of the watch can be restored
by repair work, we will undertake repair services upon request and payment.
●
Replacement with functional parts
• Please keep in mind that if original parts are not available, they may be replaced with substitutes whose
outward appearance may differ from the originals.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
●
Inspection and adjustment by disassembly and cleaning (Overhaul)
• Periodic inspection and adjustment by disassembly and cleaning (overhaul) is recommended
approximately once every 3 to 4 years in order to maintain optimal performance of the watch for a long
time. According to use conditions, the oil retaining condition of your watch mechanical parts may
deteriorate, abrasion of the parts may occur due to contamination of oil, which may ultimately lead the
watch itself to stop.
As the parts such as gasket may deteriorate, water-resistant performance may be impaired due to
intrusion of perspiration and moisture.
Please contact the retailer from whom the watch was purchased for inspection and adjustment by
disassembly and cleaning (overhaul). For replacement of parts, please specify “SEIKO GENUINE
PARTS.” When asking for inspection and adjustment by disassembly and cleaning (overhaul), make
sure that the gasket and push pin are also replaced with new ones.
• When your watch is inspected and adjusted by disassembly and cleaning (overhauled), the movement
of your watch may be replaced.
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TO PRESERVE THE QUALITY OF YOUR
WATCH
How to conduct manual reception (Receive a radio
signal manually)
The antenna is embedded at the
9 o’clock position of the watch.
Turning the antenna toward the
outside of a window helps
improve radio signal reception.
Press and
hold for
3 seconds
1
Place the watch.
Place the watch where it can easily receive a radio signal.
“To improve radio signal reception” → P.23
“Environments in which it is difficult to receive a radio
signal” → P.24
*
The watch cannot receive a radio signal outside the radio
signal reception range. “Radio signal reception range
indication” → P.18
2
Continue to press and hold the button for
3 seconds, and then release it when the
seconds hand moves to the 0-second position.
Reception starts after the seconds hand moves and stops
at the 0-second position.
*
When the time difference is set for a region other than radio
signal reception range, the seconds hand does not move to
the 0-second position. (A radio signal cannot be received
manually.) Check the time difference set currently.
“Setting the time difference (Setting the radio signal
transmitting station)” → P.29
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7
TROUBLESHOOTING
3
Place the watch and wait for a few minutes (max. 12 minutes).
When the seconds hand moves at the one-second interval, the reception is finished.
<Display until the reception is finished>
The seconds hand indicates the reception level. (Updated
every minute)
Reception level High : H Low : L
Display
Receiving state of
a radio signal
Easy to receive
Difficult to
receive
* In conjunction with the seconds hand movement, the minute
hand advances by one minute.
<If the reception has failed>
The seconds hand indicates the reception result “N.”
Reception result : N
After 5 seconds, the watch switches to the time display
mode.
“If reception has failed: The seconds hand points to N”
→ P.27
4
When the seconds hand starts to move at one-second intervals, check that the reception is successful.
When the reception is finished, check that the reception is successful.
“How to display the reception results” → P.26
* During movement of the date, neither the button nor the crown can be operated.
It takes time to receive a radio signal (max. 12 minutes).
* The required time varies depending on the receiving state of a
radio signal.
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TROUBLESHOOTING
When a radio signal cannot be received
When a radio signal cannot be received, refer to the following pages:
•
Not receivable within the radio signal reception range
Check that the time difference of the area where the watch is used is set.
When the time and date are misaligned even after the time difference is correctly selected, refer to
Troubleshooting. “Reception of a radio signal” → P.71
Since a radio signal cannot be received, the time and date became misaligned. In this case, set the time
and date manually.
“How to manually set the time” → P.59
“How to manually set the date” → P.61
* For the radio signal reception ranges, refer to “Radio signal reception range indication” → P.18.
•
When the watch is used outside the radio signal reception range
Select the time difference of the area where the watch is used.
“Setting the time difference (Setting the radio signal transmitting station)” → P.29
When the watch does not display the correct time and date even after setting the time difference, manually
set the time and date.
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TROUBLESHOOTING
■ How to manually set the time
If the watch is continually used in an environment in which a radio signal cannot be received (a region other than the
radio signal reception ranges, etc.), set the time manually.
“Radio signal reception range indication” → P.18
•
When the watch is used in an environment in which a radio signal can be received again, receive a radio signal to
set the time. “Automatic reception and manual reception” → P.17
•
When adjusting the time, the date will be accordingly adjusted.
* Even if a radio signal cannot be received, the watch can be used with the same accuracy as that of a normal quartz watch.
(Average gain/loss ±15 seconds per month)
* When the watch receives radio signals after the time is manually adjusted, it displays the time received from radio signals.
01 2
Pull out the
crown to the
second click
1
Pull the crown to the second click.
The seconds hand stops on the spot.
*
When the crown is a screw lock type, unlock it. → P.13
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Turn the crown clockwise
to advance the time.
Turn the crown counterclockwise
to set back the time.
Turn quickly to
move
continuously.
Turn again to stop
moving.
01 2
Push the
crown
back in
2
Turn the crown to set the time.
The watch switches to the manual time setting mode.
The seconds hand moves to the 0-second position and
stops.
*
The moment the date changes is midnight (12 AM). Please
be sure to set the time after ensuring that AM/PM is set
correctly.
*
When the watch switches to the manual time setting mode,
the reception result data is lost. Therefore, the reception
result is indicated as “N”.
3
Push the crown back in according to the time
signal, etc.
The operation is completed.
The watch starts to work.
*
When the crown is a screw lock type, lock it. → P.13
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■ How to manually set the date
When the date is not changed automatically due to an environment in which a radio signal cannot be received outside
the radio signal reception range, etc. (when changing from a month with 30 days or less to a month with 31 days), set
the date manually.
•
The date can be set independently regardless of the time.
•
When the watch is used in an environment in which a radio signal can be received again, receive a radio signal to
set the time. “Automatic reception and manual reception” → P.17
* When the watch receives radio signals after the date is manually adjusted, it displays the date received from radio signals.
* If the date remains incorrect even after a successful radio signal reception, the preliminary position of the date may be misaligned.
“Set the preliminary position for the date, and the hour and minute hands.” → P.65
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01 2
Pull the
crown to the
first click
Press and
hold for
3 seconds
1
Pull the crown to the first click.
The watch switches to the time difference adjustment
mode, and the seconds hand moves to the currently-set
time difference. → P.29
*
When the crown is a screw lock type, unlock it. → P.13
2
Press and hold button for 3 seconds.
The seconds hand returns to one-second interval
movement, and the watch switches to the manual date
setting mode.
*
In the manual date setting mode, the watch will operate.
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Turn the crown clockwise
to advance the date.
Turn the crown counterclockwise
to set back the date.
Turn quickly to
move
continuously.
Turn again to stop
moving.
01
Push the
crown
back in
3
Turn the crown to set the date.
4
Push the crown back in.
The operation is completed.
*
When the crown is a screw lock type, lock it. → P.13
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Preliminary position
When the date and time are not correct even if the radio signal reception is successful, the preliminary position of the
date may be misaligned.
The possible causes of misalignment of preliminary position are as follows:
In the case of having a strong impact
:
the misalignment may occur when dropping or hitting the watch.
In the case of a magnetic influence
:
the misalignment may occur when bringing the watch close to an object which
generates magnetism.
“Examples of common magnetic products that may affect watches” → P.45
* The condition “the preliminary position of hand is misaligned” means that compared to a health meter, “the zero position of a
meter is misaligned, causing a correct weight not to be displayed.”
■ Automatic hand position adjustment function (Adjustment of
preliminary positions of hour, minute and seconds hands)
The hour, minute, and seconds hands have an “automatic hand position adjustment function,” which automatically
corrects an incorrect preliminary position. Automatic hand position adjustment function activates at 12:00 both for the
AM and PM for the hour and minute hands and once a minute for the seconds hand.
* This function works when the preliminary hand position is misaligned due to external factors such as strong impact or magnetic
influence.
It does not work to adjust accuracy of the watch or slight deviations which may occur during the manufacturing process.
* The preliminary position of the hour and minute hands can also be manually adjusted.
“Set the preliminary position for the date, and the hour and minute hands.” → P.65
■ Preliminary position adjustment of the date
Since the preliminary position of the date is not automatically adjusted, it is necessary to align the position manually.
“Set the preliminary position for the date, and the hour and minute hands.” → P.65
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How to set the preliminary position
■ Set the preliminary position for the date, and the hour
and minute hands.
The preliminary position of the date is the “1st”.
The preliminary positions of the hour and minute hands are
“0:00 AM”.
When the preliminary positions are incorrect, the correct time and date cannot be displayed even if the
watch receives radio signals.
In such a case, by correcting the preliminary positions, the loss or gain of the time or date can be corrected.
When the numerical number of the date is not located at the center of the window, it can be corrected by
the same procedures as mentioned above.
To correct the preliminary positions, perform the operation on the next page.
EN
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01 2
Pull out the
crown to the
second click
Press the
button once
and then
release it
1
Pull the crown to the second click.
The seconds hand stops on the spot.
* When the crown is a screw lock type, unlock it.
→ P.13
* Do not turn the crown. Turning the crown switches the
watch to the manual time setting mode, and not the
preliminary position alignment mode. → P.59
2
Press the button once, then release.
The watch switches to the preliminary position
alignment mode for the date.
The seconds hand moves to the 13-second
position.
The date moves, and stops at the preliminary
position.
* During movement of the date, neither the button nor
the crown can be operated.
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Turn clockwise to
advance 1 step.
Turn counterclockwise
to go back 1 step.
Press the
button
once
3
Turn the crown to move the date to “1”.
Make sure that the numerical number “1” is located
at the center of the date window.
* If “1” is shown, go to step 4.
Continuous
adjustment
Turn quickly for continuous
movement.
Turn once more to stop.
Fine
adjustment
Turn intermittently to advance the
date slowly.
4
If the correct date is not shown, press
the button once.
The watch switches to the preliminary position
alignment mode for the hour and minute hands.
The seconds hand moves, and stops at the 0-second
position.
The hour and minute hands move, and stop at the
12 o’clock position.
* While the hour and minute hands are moving, the
button and crown cannot be operated.
* If the correct time is shown, go to step 5.
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01 2
Push the
crown
back in
Adjusting the time and date by receiving a radio signal
“How to conduct manual reception (Receive a radio signal manually)” → P.56
When the watch is unable to receive a radio signal, refer to
“How to manually set the time” → P.59
“How to manually set the date” → P.61
* When the crown is a screw lock type, lock it. → P.13
5
When this operation is complete, press
the crown to return.
This ends the preliminary position alignment mode,
and the seconds hand, and hours and minute
hands start to move.
When the watch returns to the time display mode,
check if the time and date are correct.
If the time and date are not correct, manually set
them.
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Troubleshooting
At trouble Possible causes Solutions
Reference
Hand
Movement
The seconds hand moves
at two-second intervals.
The energy depletion forewarning
function is activated. (P.36)
If the seconds hand moves at two- or
five-second intervals while you wear
the watch everyday, the watch is in a
condition where it cannot acquire
sufficient light, for instance, the watch
is concealed under a long sleeve shirt.
Fully charge the watch so that the
seconds hand may move at one-second
intervals.
Be careful not to conceal the watch
under a sleeve, etc., while wearing it.
When taking off the watch, place it in as
bright a location as possible.
P.34
The seconds hand moves
at five-second intervals.
The stopped seconds
hand pointing to the
15-second position
started operating.
The power save function has been
activated. (P.37)
When the watch is not exposed to
adequate light for a certain period of
time, the power save function to limit
energy consumption is automatically
activated.
Wait until the current time is displayed.
No operation is needed. (This is not a
malfunction.)
-
EN
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Hand
Movement
The stopped seconds
hand pointing to the
45-second position
started operating.
The power save function has been
activated. (P.37)
When the watch is not exposed to
adequate light for a certain period of
time, the power save function to limit
energy consumption is automatically
activated.
1.
Fully charge the watch so that
the seconds hand may move at
one-second intervals.
2.
After that, if the watch displays
the incorrect time, receive a
radio wave as needed.
P.17,
P.34
The watch hands advance
rapidly unless a button is
pressed. After the rapid
advancement is
completed, the watch
resumes its normal
movement.
The power save function has been
activated. (P.37)
The automatic hand position alignment
function was activated. (P.64)
When the hand positions deviate to
display incorrect time as a result of
external influences, etc., the watch
automatically corrects the hand
misalignment by the automatic hand
position alignment function.
No operation is needed. (This is not a
malfunction.)
-
EN
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Reception
of a radio
signal
The watch is unable to
receive a radio signal.
The reception results have
failed and the seconds
hand points to N (the watch
does not receive a radio
signal).
The watch was moved while it was
receiving a radio signal.
(It takes 12 minutes at the longest to
receive a radio signal successfully.)
Do not move the watch while it is
receiving a radio signal.
Because it takes time to receive a radio
signal successfully, leave the watch
untouched for 12 minutes at the longest.
P.23,
P.57
The watch was left where the radio
signal was weak or where it was unable
to receive a radio signal. (P.24)
Place the watch where it is able to easily
receive a radio signal.
P.23
Transmitting stations may have
stopped transmitting radio signals for
some reason. (Transmission stop)
Check the website of each transmitting
station for further information
concerning a transmission stop.
Attempt to receive a radio signal again
after a while.
P.25
The time difference is set to regions
other than the radio signal reception
ranges.
1. Check the set time difference and
set the correct time difference.
2. When the watch is not displaying the
precise time, receive a radio signal
again if necessary.
P.17,
P.29
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Charging
the solar
battery
The stopped watch was
exposed to an
adequate light for
longer than “the time
required to fully charge
the watch”, however, it
does not resume its
normal one-second
interval movements.
The amount of exposed light is too
weak.
The time for charging the watch is not
sufficient.
The time required for charging the
watch depends entirely on the amount
of exposed light the watch receives.
Refer to “Guide to charging times” to
charge the watch.
P.35
The built-in IC of the watch has fallen
into an unstable condition.
Refer to “In case of an abnormal
movement” to reset the system.
P.76
Misalignment
of the time
and hand
positions
The watch temporarily
gains or loses time.
The watch has been left in an extremely
high or low temperature place for a long
time.
1. When the watch returns to a normal
temperature, it will display the
precise time as before.
2. If the watch still gains or loses the
time, conduct manual reception if
necessary.
3. If the watch cannot resume normal
movement even after conducting
the above mentioned procedures,
consult the retailer from whom the
watch was purchased.
P.56
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Misalignment
of the time
and hand
positions
The reception results are
successful, but the precise
time is not displayed.
The watch fails to receive a radio signal
correctly as a result of external
influence. (Incorrect reception)
1. Place the watch where it is able to
receive a radio signal more easily.
2. Conduct manual reception if
necessary.
P.23,
P.56
The hand positions were misaligned as
a result of external influence.
The hands are out of the preliminary
position as a result of external
influence.
“Preliminary position” → P.64
1. The automatic hand position
alignment function will operate, and
these will be corrected. Continue to
use the watch normally. The
automatic hand position alignment
function operates every 12 hours (at
12 AM and 12 PM) for the hour and
minute hands, and every minute for
the seconds hand. If urgent, perform
manual time adjustment.
2. If the watch still gains or loses time,
refer to “In case of an abnormal
movement” to perform procedures.
3. If the watch cannot resume normal
movement even after conducting
the above mentioned procedures,
consult the retailer from whom the
watch was purchased.
P.64,
P.76
The seconds hand position
is not correctly aligned in
“the reception results
display” or “the reception
level display.”
The seconds hand is out of the
preliminary position as a result of
external influence.
“Preliminary position” → P.64
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Misalignment
of the time
and hand
positions
The watch displays an
incorrect time hour unit,
even though it displays the
precise time of minutes
and seconds.
The time difference settings are
incorrect.
Check the time difference settings, and
set these to the local region.
P.29
Misalignment
of the date
The reception results are
successful and the precise
time is displayed, but the
date is not correctly
displayed.
The date is out of the preliminary
position.
This happens when the date is out of
the preliminary position as a result of
influence of various external sources or
after the built-in IC is reset.
Set the date to the preliminary position
“1” (the 1st).
P.65
Operation
The crown or button
cannot be operated.
The stored electric power is running
short.
Sufficiently charge the watch until it
starts moving at one-second intervals.
P.34
Hands and date are moving right after
a setting is carried out by the crown or
button operation.
Wait without doing anything.
After the date stops, the crown and
button can be operated.
-
EN
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TROUBLESHOOTING
At trouble Possible causes Solutions
Reference
Operation
You get lost in the middle
of the operation.
-----------
Return to the status before the start of
the operation, and try the operation
again.
If the crown is pulled out, push it in.
If the crown is not pulled out, then pull it
out and push it in again.
This will return to one-second interval
movement for a maximum of 9 minutes.
After this, try the operation again.
-
Others
Blur on the dial glass
persists.
A small amount of water has got inside
the watch due to deterioration of the
gasket, etc.
Contact the retailer from whom the
watch was purchased.
-
* For the solution of troubles other than the above, consult the retailer from whom the watch was purchased.
EN
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Seiko 7B72 Operating instructions

Seiko
Brand
Seiko
Model
7B72
Category
Watches
Type
Operating instructions
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